Add server time method

Set author name

Re-add API_KEY support file

Replace ServerTime.find with Server.time

Exclude api_key.rb.example

Add client server integration test

Add server time functional test

Add 3 server tests

Remove 0.3.1 from change log

Rename server_spec.rb

Re-add api_key.rb.example

Remove api_key.rb

Remove API key

Add spec/support/api_key.rb to gitignore